We played as a kid and it was always fun but a bit annoying when players would argue about whether they had safely crossed the line when the other team tagged them, so in my 20s, I had the idea to solve that once and for all with 1,000 feet of yellow caution tape! I organized multiple games at Spotts Park in Houston, a city not known for having elevation changes, but Spotts has a bit of hilly landscape to mix things up, plus plenty of trees and other things to hide behind. It wasn't pitch black since we were in the middle of the city, but it was big enough that people could sneak to the other side undetected if they kept looking for routes with no enemy patrols. We actually used glow sticks as the flags and the only particular rule was that they had to be visible from multiple sides if you were several feet away. A lot of adults came out to play--at least a dozen per side but sometimes twice that many!